I have a drawing in inches it is 74" wide by 25" high.
print preview on A0 landscape paper is almost twice as wide as a sheet
OK
change to millimeters and the print preview on A0 landscape paper is a little thing down in the bottom left corner 74 mm by 25 mm
NOT OK
I want the drawing to maintain the real size
otherwise how do I accurately scale the whole drawing inches to millimeters